import random
from PIL import Image, ImageDraw, ImageFont, ImageFilter


def check_code(width=128, height=38, char_length=4, font_file='firstlive.ttf', font_size=28):
    code = []
    img = Image.new(mode='RGB',size=(width, height), color=(255, 255, 255))
    draw = ImageDraw.Draw(img, mode='RGB')

    def rndChar():
        """生成随机字母"""
        return  chr(random.randint(65, 90))
    def rndColor():
        """生成随机颜色"""
        return (random.randint(0,255), random.randint(10,255), random.randint(64, 255))
    #写文字
    font = ImageFont.truetype(font_file,font_size)
    for i in range(char_length):
        char = rndChar()
        code.append(char)
        h = random.randint(0, 4)
        draw.text([i * width / char_length, h], char, font=font, fill=rndColor())
    # 写干扰点

    for i in range(48):
        draw.point([random.randint(0, width), random.randint(0,height)],fill=rndColor())

    # 写干扰圆圈
    for i in range(40):
        draw.point([random.randint(0,width), random.randint(0,height)],fill=rndColor())
        x = random.randint(0,width)
        y = random.randint(0,height)
        draw.arc((x,y, x+4, y+4), 0, 90, fill=rndColor())
    # 画干扰线
    for i in range(5):
        x1 = random.randint(0, width)
        y1 = random.randint(0, height)
        x2 = random.randint(0, width)
        y2 = random.randint(0, width)
        draw.line((x1, y1, x2, y2), fill=rndColor())
    img = img.filter(ImageFilter.EDGE_ENHANCE_MORE)
    return img, ''.join(code)

# if __name__ == '__main__':
#     img,code_str = check_code()
#     print(code_str)
#     with open('code.png', 'wb') as f:
#         img.save(f, format='png')